US3463940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D.c. restoration circuit
Assignee: Nortel Networks Ltd
•
Filing: 1966-02-02
•
Granted: 1969-08-26
•
Expires: 1986-02-02
Abstract
No abstract record available.
Inventors
- 👤 Alan R Kaye
- 👤 Gordon C Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:43
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/16; H04N5/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2539774A
Cited
US3375326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |